[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#35508: 27.0.50; Fine-ordering of functions on hooks
From: |
Eli Zaretskii |
Subject: |
bug#35508: 27.0.50; Fine-ordering of functions on hooks |
Date: |
Wed, 01 May 2019 21:00:21 +0300 |
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 30 Apr 2019 16:37:08 -0400
>
> Occasionally it's important to control the relative ordering of
> functions on hooks. It's usually a bad idea, but sometimes alternatives
> are worse.
Could you please give a couple of examples? I agree that it's usually
a bad idea, so maybe we should resist the temptation. If the worse
comes to worst, a Lisp program could concoct the entire hook list in
any order it sees fit, right?
> +The place where the function is added depends on the DEPTH
> +parameter. DEPTH defaults to 0.
So from now on, omitting DEPTH will not necessarily put the function
at the beginning of the hook list? That's backward-incompatible, no?
In any case, this default is insufficiently tested by the tests you
propose.
> By convention, should be
> +a number between -100 and 100 where 100 means that the function
> +should be at the very end of the list, whereas -100 means that
> +the function should always come first. When two functions have
> +the same depth, the new one gets added after the old one if
> +depth is strictly positive and before otherwise.
So using 100 more than once makes the last one "win"?
> +For backward compatibility reasons, a symbol other than nil is
> +interpreted as a DEPTH of 90.
This is not explicitly tested by the test.
Thanks.
- bug#35508: 27.0.50; Fine-ordering of functions on hooks,
Eli Zaretskii <=
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Stefan Monnier, 2019/05/01
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Stefan Monnier, 2019/05/08
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Eli Zaretskii, 2019/05/11
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Stefan Monnier, 2019/05/11
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Eli Zaretskii, 2019/05/11
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Stefan Monnier, 2019/05/13
- bug#35508: 27.0.50; Fine-ordering of functions on hooks, Stefan Monnier, 2019/05/29